Index: dlls/amstream/mediastream.c
===================================================================
RCS file: /home/wine/wine/dlls/amstream/mediastream.c,v
retrieving revision 1.5
diff -u -r1.5 mediastream.c
--- dlls/amstream/mediastream.c	23 Apr 2007 19:28:07 -0000	1.5
+++ dlls/amstream/mediastream.c	28 Mar 2008 19:25:15 -0000
@@ -109,9 +109,15 @@
 {
     IMediaStreamImpl *This = (IMediaStreamImpl *)iface;
 
-    FIXME("(%p/%p)->(%p) stub!\n", This, iface, ppMultiMediaStream); 
+    TRACE("(%p/%p)->(%p)\n", This, iface, ppMultiMediaStream);
 
-    return S_FALSE;
+    if(!(*ppMultiMediaStream))
+        return E_POINTER;
+
+    *ppMultiMediaStream = This->Parent;
+    IMultiMediaStream_AddRef(*ppMultiMediaStream);
+
+    return S_OK;
 }